Description
Comparison points and tradeoffs
When comparing Boat Ignition Switch with Key Replacement for Mercury Mariner Outboard Motor Control Box with 2 Keys 3 Position 6 Wire Connectors – Replace Mercury Ignition Switch 87-17009A2 87-17009A5 with other Ignition Starter options, use this source-backed detail as the primary discriminator: Colors on switch wires match factory color codes. Direct replacement, a simple plug & play with no wire splicing.
Use this second fact to evaluate the tradeoff: REPLACEMENT IGNITION STARTER SWITCHES – An ignition switch, starter switch or start switch is a switch in the control system of a motor vehicle that activates the main electrical systems for the vehicle. A third point to compare across alternatives is: Category: Replacement Parts / Switches & Relays / Switches / Ignition Starter.
Alternative-selection boundary
Choose an alternative when its stated identifiers, application, package, or specifications better match the requirement; no unverified competitor claim is introduced here.
Complete source-backed product details
Product Description
Features:
- PROFESSIONAL DESIGN
3 Position OFF – RUN- STAR and 6 wires for push to choke.
- HIGH QUALITY
Made of high performance polyester and high quality brass, which provides safety, durability and excellent electrical conductivity.
- EASY INSTALLATION
Colors on switch wires match factory color codes. Direct replacement, a simple plug & play with no wire splicing.
Specifications:
- Brand: SKARUMMER
- Material: Brass + Plastic
- Color: Black
- Replacing OE Number for Reference: 87-17009A2 87-17009A5 MP41070-2 MP41070-1 MP41070
- Package List: 1 * Ignition Key Switch + 2 * Keys Size: 57 * 37mm / 2.3 * 1.5in
- Package Weight: 3.99 Ounces
- Fitment: For Mercury Mariner Outboard Remote Control Box
Note:
- This is a high quality aftermarket product but not genuine.
- It is advisable to check the existing Part Number before placing an order.
Source product highlights
About this item
- REPLACEMENT IGNITION STARTER SWITCHES – An ignition switch, starter switch or start switch is a switch in the control system of a motor vehicle that activates the main electrical systems for the vehicle. If you have to wiggle the key hard or the boat won’t start when the key is turned, it means you need to replace a new engine starter ignition key switch for your boat.
- PROFESSIONAL DESIGN – 3 Position OFF – RUN- STAR and 6 wires for push to choke. This Boat Engine Ignition Switch made of high performance polyester and high quality brass, which provides safety, durability and excellent electrical conductivity. You can buy it with great confidence.
- COMPATIBILITY – This Ignition Key Switch replacement for most Mercury Outboard Control Box, replace OE number for reference: Mercury 87-17009A2 87-17009A5, Sierra MP41070-2 MP41070-1 MP41070. Please kindly check the fitment to ensure this will fit your model before ordering.
- EASY INSTALLATION – Colors on switch wires match factory color codes. Direct replacement, a simple plug & play with no wire splicing. Meets or exceeds OEM standards, 100% tested before shipping. Please kindly check the fitment to ensure this will fit your model before ordering.
- 24-MONTH WARRANTY – Order from SKARUMMER, we offer 24 month warranty. If you have any other questions on our Boat Engine Ignition Key Switch, please contact us at the first time, We are always here to support you. You can buy it with confidence.




Denny KuhKuhKààaaaaa –
The wires were smaller diameter than the one that I had in my boat. A wiring diagram would have made it easier to use. I had to go from a 6 to a 5 wire and keep the old choke separate from the key 🔑 . It seems to be working fine now after about 50-60 starts of the motor. Time will tell! ,,, It lasted a little more than one season.I got the broken key out of the old ignition and it went back in. I’m not sure 100% what the problem was. I’ll let you know if it happens again.
Charles Jennings –
Delivery was quick, price was reasonable. Installation simple except for having to work under the dash. Believe it to be good quality. Turned out to not be the problem. Kept the old switch as a spare.If you need an ignition switch, would recommend this one.
Charlene C. Wibben –
Arrived on time & switch works well!
wayne –
Works great. Easy to hook up. Thanks.
Customer –
Operation was fine. Did not like the plastic collar nut to tighten it on to the control box.
Andrew Ackley –
Bought this to replace my ignition for my Key West with a 150 Mercury Optimax and it has worked great. The wires were color coded to match the existing colored wires.
mark neargarder –
works perfect
Ian watson –
This ignition switch works for about a month considering I go out once a week so that’s four trips. This key will short out this key will stuck your choke open and it will also release the key while the engine is running. It is poorly made, and advertised to be a quality product, it is actually trash. Like I said I bought three of them just this summer. I have a spare one on board just because of how bad this thing is. It will probably leave you stranded or ordering more of these parts just to keep your boat going. I wish I could get my $100 back that I invested in faulty equipment.
Django –
on my boat